fix: guardian live page (#3549)

lib/routes/guardian/guardian.js

@@ -28,7 +28,7 @@ module.exports = async (ctx) => {
 
             const single = {
                 title: item.title,
-                description,
+                description: description ? description : item.content,
                 pubDate: item.pubDate,
                 link: item.link,
             };

lib/routes/guardian/utils.js

@@ -4,6 +4,10 @@ const ProcessFeed = (data) => {
     const $ = cheerio.load(data);
     const content = $('div.content__article-body');
 
+    if (content.length === 0) {
+        return '';
+    }
+
     // remove useless DOMs
     content.find('aside, .ad-slot, .after-article, .contributions__epic, .submeta, .inline-expand-image, inline-triangle, .block-share').each((i, e) => {
         $(e).remove();